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Figure 1. A very large citrus canker lesion on red grapefruit illustrates the problems that Florida citrus growers have been facing with citrus canker, caused by Xanthomonas axonopodis pv. citri. Photograph is provided courtesy of Tim R. Gottwald, James H. Graham, and Tim S. Schubert in Citrus Canker: The Pathogen and Its Impact, the APSnet feature story for Aug.-Sept., 2002 (http://www.apsnet.org/online/feature/citruscanker/). BACK

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